Crayon and color media

ABSTRACT

A MAKER WHICH IS HARDER THAN MOST HOUSEHOLD OBJECTS, AND HENCE WILL NOT ABRADE TO LEAVE A COLOR MARK. ABRASIVE SURFACE SHARP ENOUGH TO ABRADE THE MARKER. THE SURFACE IS FILLED WITH A WAX WHICH WILL CAUSE PIGMENT ABRADED BY THE SHARP SURFACE TO BE COMPOUNDED THEREIN AS CRAYON COLOR MARKING.

United States Patent Inventors Shirley A. Caywood Warsaw; Clarence L.Neuvirth, Chagrin Falls, Ohio Appl. No. 821,039 Filed May I, I969Patented June 28, I971 Assignee Wall Street Dynamics, Inc.

Akron, Ohio CRAYON AND COLOR MEDIA 4 Claims, 3 Drawing Figs.

US. Cl 401/49, 35/26, 2 83/63 Int. Cl 843k 19/00, B42d 15/00 Field ofSearch 35/26; 401/49, 52, 88; 283/63 [56] References Cited UNITED STATESPATENTS 2,622,560 12/1952 Menaker 33/41 3,084,455 4/1963 Demler 35/26Primary Examiner-Charles Lawrence Assistant Examiner-L. AntenAttorneyRay S. Pyle ABSTRACT: A marker which is harder than mosthousehold objects, and hence will not abrade to leave a color mark.Abrasive surface sharp enough to abrade the marker. The surface isfilled with a wax which will cause pigment abraded by the sharp surfaceto be compounded therein as crayon color marking.

CRAYON AND COLOR MEDIA BACKGROUND OF THE INVEN'ITON Coloring pencils andmarking sticks, not of liquid or oil nature, are usually a pigmented waxhard enough to be held in the hand, but are abradable by rubbing uponsubstantially any surface. Thus, the color may be applied to plainsurfaces, or to preprinted surfaces. The former allows the creativespirit to establish the pattern, whereas the latter encourages onlydexterity control.

Unfortunately, such items. especially of the wax nature, are not alwaysconfined to appropriate surfaces by the young person who does notunderstand the potentially destructive effect of coloring furniture andwalls.

Pigmented or colored soap has been promoted as a coloring media, becausethe soap is water soluble and ostensibly will enable facile cleaningwhenever the substance is applied to inappropriate surfaces.

SUMMARY OF THE INVENTION The object of the invention is to provide apigmented marker which is substantially incapable of marking on commonhousehold objects and clothing.

A further object of the invention is to provide a sheet, eitherpreprinted or plain, which has a surface of abrasive nature interphasedwith a substance which will accept and mix with abraded pigmentparticles removed from a pigment object by the abrasive surface.

A specific object, therefore, is to provide a very hard chalk or plastercolor pigment body which will not rub off on household items orclothing, and a sheet of paper with sharp abrasive particles filled witha wax which will allow the abraded matter to compound into the wax andform a wax-pigment admixture in situ.

DESCRIPTION OF THE FIGURES FIG. 1 is a perspective view of a coloringbook with one page in position to be colored, said page being a sheetwith a preprinted outline form, and a surface prepared according to theprecepts of this invention;

FIG. 2 is a greatly enlarged and exaggerated cross section of a portionof the sheet; and,

FIG. 3 is a marker of hard pigment material according to this invention,on the end of a stick used as a holding handle.

DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION The illustratedembodiment is a book having a sheet printed with the letter A and apictorial representation of an apple. The sheet may be plain, becausemany modern teachers reject the concept of providing objects to color.The guidelines are not a part of the invention.

The surface of sheet 10 is coated, at least in the area to be colored,with a very fine series of projections, which must be sharp. The mostsatisfactory material from the standpoint of usefulness and and price,is white silica. If a preprinted pattern is used, it is necessary toavoid dark colored abrasive material. White silica will allow theprinting to show through. The silica is a very sharp abrasive, and isconsidered to be preferred. Such particles are suggested in FIG. 2 bythe objects 14 shown in profile.

The abrasive may be secured by an adhesive directly to the surface ofsheet 10, or captured by the substance used to accept and mix withabraded pigment.

This invention may be considered as the creation of crayon in situ.Crayon" isa word of French origin generic to a variety bfinarkingdevices, but at least in the United States, has come to be the nameassociated with a pigmented wax. The wax is easily abraded or rubbedonto substantially any surface, and will adhere the coloring materialonto the surface.

Rather than a wax crayon, this invention provides a marking device whichis very hard, and can be abraded only by a sharp abrasive surface In ageneric sense it is a crayon, but not in the popular sense of awax'pigment.

A filling material is coated over the surface of the sheet among theprojecting particles on the surface. The filling material is capable ofentrapping particulate material abraded from the marking device. Thepreferred filling material is microcrystalline wax.

The wax is floated over the surface of the sheet 10 to fill the areaamong the abrasive particles, but not to cover them. The wax may fillaround particles 14 previously adhered to the surface, or the particlesmay be carried by, and secured by, the

wax.

Then, by abrading any material on the abrasive projections 14, theabraded particles will be forced into the wax by the remainder solidportion of the pigment material and will be mixed into the wax to fonn acompound of the wax and pigment. Preferably, the material abraded isdyed to an intense degree, or is a color pigment. Any material that willcling to the surface and reflect light to the eye of the observe willserve as a pigment. Even a conventional wax crayon would function inthis capacity. The wax on the surface simply holds the color material inplace as is done by conventional crayons. The act of compounding thepigment into the wax creates, in situ, the

equivalent of the common crayon of pigmented wax. Preferably, of course,a very hard chalk or plaster dyed with an intense dye, or pigment, isthe preferred marker.

The crayon marker may be made in any of many useful and artful forms.FIG. 3 illustrates a from which has sufficient pigment for a coloringbook of several pages. The pigment is in the form of a rounded head 16on the end of a stick-handle 18. The size of the head 16 should be largeenough to provide all the color needed for the book, but not enough tobe wasteful. The marker is discarded after the book is finished.

The pigment material represented in FIG. 3 is composed of:

Parts by weight Calcium Sulphate 99. 5-98 Gum Acacia 9-11 Water solubledye 5-1 It is important to understand that any material that is colored,abradable by silica, compatible with wax materials, and is harder thanmost household items, will serve as a satisfactory marker. The aboveexample is one suitable composition made specifically for the purpose ofthis invention.

Another example is common chalk soaked in gum acacia to absorb all itwill hold. White chalk will normally become much more hard than coloredchalk. High pigment tends to produce a softer marker. The degree ofmarking tolerable, and the intensity of color, are matters of choice,not of principle.

Gum acacia is a common item of commerce, and is one of a variety ofnatural gums. See any Merck Index, or other chemical dictionary forfurther detail if necessary.

The wax material chosen as the most suitable for effectiveness and costto fill the surface of sheet 10 is a microcrystalline product sold byWitco Corporation as W-835. Other sources are readily available.Microcrystalline wax is a cold tack material which may be mixed with theabraded pigment without fracturing.

An example of a suitable sheet coating is:

Abrasive Coat:

Acacia 30 percent solution 17 cc. Silica 219 (WCD) 10 gm. Glycerin 1 gm.

Water to make cc.

Mix well, paint on paper, heat dry.

Wax coat:

W-835 (Witco) 5 gm.

Silica219 (WCD) 10 gm.

Mineral spirits to make 100 cc.

Mix well and paint on dried abrasive-coated paper. Dry. The wax willadhere to the surface, but in use does not present a surface which issticky. In this sense it is characterized by a substantial lack ofadhesion.

Silica need not be pure, but white silica is preferred. Designation 219(WCD) is that of Whittaker Clark and Daniels, 100 Church St., New York,N. Y. 10007.

W835 is made by the Sonneborn Division, Witco Corporation, 75 E. WackerDrive, Chicago, 1., USA. 60600.

Cold Tack is a term of art. Refer to such publications as a bulletinMultiwax Microcrystalline Waxes by Witco Corporation. This term definesa product which is pliable or plastic in the sense of being modeled, andmixable at room temperature.

It has been found that just the wax coat will bond sufficient silica toproduce a satisfactory coat for softer markers.

Other modifications will be suggested within the frame of reference setforth in the objects and the above examples.

We claim:

1. In combination, a receiver body for accepting a pigment in display,and a pigment applicable to said body, characterized by:

means superimposed upon said body to provide a pigment abrasive surfacecharacterized by sharp grip members projecting from the surface thereofwith spaces therebetween;

a waxlike surface coating of material between said grit memberscharacterized by cold tack and substantial lack of adhesion, but whichmay be compounded by mixing while cold with a pigment to create apigmented composite coating; and

a nonwax pigment member characterized by becoming powder when abradedand having a hardness above a capability of being abraded by surfaceslacking a cutting grit nature, and may be abraded by said sharp gritmembers, whereby said pigment member may be abraded on said body surfaceto produce a fine particulate condition, and the removed substancethereof is captured and compounded into the body surface coatingmaterial during the abrading act as a coloring media.

2. A combination as defined in claim 1, wherein said surface coating isa microcrystalline wax.

3. In the combination as defined in Claim 1, said pigment membercomprising:

a color pigment; and,

a hardening agent which renders said pigment harder than the abradingcharacteristics of household furnishings- 4. A crayon marker as definedin claim 3 wherein said pigment is calcium sulfate and the hardeningagent is acacia gum.

